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Physical & Chemical properties

Viscosity

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Description of key information

Viscosity is not required under REACH as 1,1,1,2-tetrafluoroethane is a gas. Ideal gas calculations indicated that the viscosity of 1,1,1,2 -tetrafluoroethane (R 134a) will be 0.1295x10E-4 Ns/m2 at 15°C.

Key value for chemical safety assessment

Additional information

Substance is a gas. According to the REACH guidance on information requirements and chemical safety assessment (chapter R7.A), viscosity is a property of liquid substances and therefore a study is not required for gases. Ideal gas calculations indicated that the viscosity of 1,1,1,2 -tetrafluoroethane (HFC 134a) will be 0.1295x10E-4 Ns/m2 at 15°C.